Wheel bearing.
Wheel bearing/hub assembly
Sounds like a wheel bearing.
Check your brakes, if could be possible that they are starting to go out on the left side.
I hear a clicking noise coming from my jeep when I hit speeds greater then 50 MPH? any ideas on what can cause this
The roof rack or lauggage rack may be catching wind and vibrating. If it has adjustable cross members slide them toward the back of the van and see if that helps.
This can be a broken belt in a tire, low tire pressure, or defective wheel bearing. Jack up the rear and rotate the wheels listening for any noise. Inspect the tire for uneven wear or anything out of the ordinary. Look for bulges in the sidewall, I would suspect you have a tire problem.
it would depend on what kind of humming sound you are referring too. If you are over due on a transmission service or what not it will humm at higher speeds and as you slow down the humming slows with it, or if your brakes have gone bad it will make a humming sound once you hit over 30 mph. it could be a lot of things but those are some options to check out
the spare tyre.
A failing wheel bearing is a likely cause.
Some ideas coulb be something is lose and is just rattling or a mechanivcal problem under the hood.
i would really like to know myself
Possibly worn wheel bearings can create a humming or groaning sound.